---
title: "A person’s center of mass is easily found by having the person lie on a reaction board. A horizontal, \\( 2.3 \\) \\( \\text{m} \\)-long, \\( 6.1 \\) \\( \\text{kg} \\) reaction board is supported only at the ends, with one end resting on a scale and the other on a pivot. A \\( 64 \\) \\( \\text{kg} \\) woman lies on the reaction board with her feet over the pivot. The scale reads \\( 27 \\) \\( \\text{kg} \\)."
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url: "https://nerd-notes.com/ubq/91224/"
date_modified: "2025-05-07T02:23:38+00:00"
---

# A person’s center of mass is easily found by having the person lie on a reaction board. A horizontal, \( 2.3 \) \( \text{m} \)-long, \( 6.1 \) \( \text{kg} \) reaction board is supported only at the ends, with one end resting on a scale and the other on a pivot. A \( 64 \) \( \text{kg} \) woman lies on the reaction board with her feet over the pivot. The scale reads \( 27 \) \( \text{kg} \).

A person’s center of mass is easily found by having the person lie on a reaction board. A horizontal, \( 2.3 \) \( \text{m} \)-long, \( 6.1 \) \( \text{kg} \) reaction board is supported only at the ends, with one end resting on a scale and the other on a pivot. A \( 64 \) \( \text{kg} \) woman lies on the reaction board with her feet over the pivot. The scale reads \( 27 \) \( \text{kg} \). What is the distance from the woman’s feet to her center of mass? Express your answer with the appropriate units.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/91224/*